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Journal of Materials Science

, Volume 31, Issue 10, pp 2741–2745 | Cite as

Fourier transform-infrared and optical studies on sol-gel synthesized SrTiO3 precursor films

  • M. N. Kamalasanan
  • N. Deepak Kumar
  • Subhas Chandra
Papers

Abstract

SrTiO3 precursor thin films were deposited on KBr single crystals and fused silica substrates by the sol-gel technique. Fourier transform-infrared (FT-IR) spectra, ultraviolet-visible spectra and X-ray diffraction spectra were recorded after the samples were cured at various temperatures. FT-IR spectra showed a gradual decrease in -OH concentration indicating removal of hydroxyls and reduction in peaks belonging to organic groups indicating the removal of organics. After annealing at 500 °C, the peak due to SrTiO3 crystallites (∼500 cm−1) began to appear, indicating crystallization. The optical spectra showed an increase in refractive index due to densification as the curing temperature increased. With increase in curing temperature, the thickness of the film decreased, indicating densification due to pore collapse. The optical band gap also changed with annealing due to the structural transformation from amorphous to crystalline phase. X-ray diffraction spectroscopy confirmed the structural changes.

Keywords

Crystallization Refractive Index Fuse Silica Structural Transformation Optical Spectrum 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    M. N. KAMALASANAN, N. Deepak KUMAR and Subhas CHANDRA,J. Appl. Phys. 76 (1994) 4603.CrossRefGoogle Scholar
  2. 2.
    S. K. DEY, Jong-Jan LEE,IEEE Trans. Elect. Devices 39 (1992) 1609.CrossRefGoogle Scholar
  3. 3.
    G. M. DAVIS and M. C. GOWER,Appl. Phys. Lett. 55 (1989) 112.CrossRefGoogle Scholar
  4. 4.
    P. LI, J. MCDONALD and T. M. LU,J. Appl. Phys. 71 (1992) 5596.CrossRefGoogle Scholar
  5. 5.
    M. I. Diaz GUEMES, T. G. CARRENO, C. J. SERNA and J. M. PALACIOUS,J. Mater. Sci. 24 (1989) 1011.CrossRefGoogle Scholar
  6. 6.
    K. Y. CHEN, L. L. LEE and D. S. TSAI,J. Mater. Sci. Lett. 10 (1991) 1000.CrossRefGoogle Scholar
  7. 7.
    P. C. JOSHI and S. B. KRUPANIDHIJ. Appl. Phys. 73 (1993) 7627.CrossRefGoogle Scholar
  8. 8.
    M. N. KAMALASANAN, N. Deepak KUMAR and Subhas CHANDRA,ibid. 74 (1993) 679.CrossRefGoogle Scholar
  9. 9.
    C. J. BRINKER and G. W. SCHERER, “Sol-Gel Science: The Physics and Chemistry of Sol-Gel processing” (Academic Press, New York, 1990).Google Scholar
  10. 10.
    R. T. MARA, G. B. B. M. SUTHERLAND and H. V. TYRELL,Phys. Rev. 96 (1954) 801.CrossRefGoogle Scholar
  11. 11.
    J. C. MANIFACIER, J. GASOIT and J. P. FILLARD,J. Phys. E. Rev. Sci. Instrum. 9 (1976) 1002.CrossRefGoogle Scholar
  12. 12.
    M. WÖHLECKE, V. MARRELLO and A. ONTON,J. Appl. Phys. 48 (1977) 1748.CrossRefGoogle Scholar
  13. 13.
    M. DIDOMENICO Jr and S. H. WEMPLE,J. Appl. Phys. 40 (1969) 7220.Google Scholar
  14. 14.
    G. A. BARBOSA, R. S. KATIYAR and P. S. PORTO,J. Opt. Soc. Am. 68 (1978) 610.CrossRefGoogle Scholar

Copyright information

© Chapman & Hall 1996

Authors and Affiliations

  • M. N. Kamalasanan
    • 1
  • N. Deepak Kumar
    • 1
  • Subhas Chandra
    • 1
  1. 1.National Physical LaboratoryNew DelhiIndia

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